Improved alloy for the manufacture of metal sheets, foil



LEOPQLD BRA'NDEIS, OF BRQOKLYN, NEW YORK.

' Letters Patent No. 70,513, dated November 5, 1867. I

IMPROVED ALLOY FOR THE MANUIAGTURE 0F METAL SHEETS, FOIL, 6w,

TO ALL WHOM IT MAY CONCERN: Y

,Be it known that I, LEOroLD BRANDEIS, of the city of Brooklyn, county of Kings, and State of New York, have invented a new and useful Process for the Manufacture of a New and Superior Roofing Material, suitable at the same time for plumbers use, for chemical works, and for making canisters, capsules, caps for bottles, and foizpacking dry substances like tea, coffee, spices, tobacco, chocolate, lite.

I \yill proceed now to describe my process, which is divided into two parts: the first part including the material used for roofing and other purposes where strength, pliability, and resistance to the changes of temperature and weather are required; the second, where a thin and still stifl' covering is wanted 'to exclude moisture and avoid thereby mouldiness or fermentation. I i I v To produce the article for roofing and other purposes mentioned, I prepare an alloy of'twenty-five per cent. zinc, seventy-five per cent. of lead. This alloy has allthe advantages of pure lead, while it is cheaper, tougher, and more durable. This alloy I coat with tin, or surround the ingots with cylinders of tin and roll it out. I can cast these ingots in any suitable shape, or press them out of a die by means of hydraulic pressure. By means of chilled-iron or steel rollers I produce sheets from two pounds to ten pounds per square foot. These sheets, properly folded and pressed down, do not require any soldering on the roof, bu'tthe outside being a solid covering or coat of tin, will resist oxidizution far better than any metallic substance used so far, will be less liable to contraction and expansion than sheet iron tinned, (tin plate,) and willanswer better than sheet lead for cisterns, plumbers work, chemical works, 850., &c. v

The second part of my process consists in preparing thinner 'sheets of the tinned alloy for .lining boxes, and for making thin sheets used for wrapping purposes. I make for this purpose an alloy containing,.according to the special use of the article to be manufactured, between ten and fifteen per cent. zinc, and ninety per cent. to eighty-five per cent. of lead. I co'at this also with tin, ai'ter casting or pressing suitable ingots of any desirable shape or size. But to enable me to roll it as thin as may be required, I expose the metal to the-action of hot water, (at 212.) or to steam between the rollings that may be required to bring it to its proper degree of thickness, so as to keep the metal perfectly ductile during this operation. My sheets, bythe mixture of zinc and lead, get stifi'er and stronger without losing their pliability, or without increase of weight.

I do not claim to produce tin-foil by.covering lead, either hot or cold, with tin, and by rollingthese metals out together; nor do I claim to make a covering or cylinder of tin first, and to fill this with hot or cold lead by casting, hydraulic or other pressure, as this has been done before; but I X I claim to produce metal sheets of any thickness, perfectly pliable, not easily acted upon by weather and temperature, of great strength and durability for roofing, plumbers, tinmens, and chemicaLnse, for grocers, tobacconists, perfumers, and confectioners, by making an alloy of lead and other metals in suitable proportions and shape, by protecting this alloy with a coat of tin surrounding it, andto produce from this alloy, so prepared, sheets or leaves of any size and weight, and for-the device of application of hot water or steam between the rollings.

LEOPOLD BRANDEIS; I

Witnesses:

HERMAN Wrscnmann, WM. KELLOGG. 

